LM26400Y

ACTIVE

Dual 2A, 500kHz Wide Input Range Buck Regulator

Product details

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 2 Vin (min) (V) 3 Vin (max) (V) 20 Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 500 Features Enable, Light Load Efficiency, Power good, Pre-Bias Start-Up Control mode current mode Vout (min) (V) 0.6 Vout (max) (V) 16 Iq (typ) (µA) 4000 Duty cycle (max) (%) 96
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 2 Vin (min) (V) 3 Vin (max) (V) 20 Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 500 Features Enable, Light Load Efficiency, Power good, Pre-Bias Start-Up Control mode current mode Vout (min) (V) 0.6 Vout (max) (V) 16 Iq (typ) (µA) 4000 Duty cycle (max) (%) 96
HTSSOP (PWP) 16 32 mm² 5 x 6.4 WSON (NHQ) 16 25 mm² 5 x 5
  • Input Voltage Range of 3 V to 20 V
  • Dual 2-A Output
  • Output Voltage Down to 0.6 V
  • Internal Compensation
  • 500-kHz PWM Frequency
  • Separate Enable Pins
  • Separate Soft-Start Pins
  • Frequency Foldback Protection
  • 175-mΩ NMOS Switch
  • Integrated Bootstrap Diodes
  • Overcurrent Protection
  • HTSSOP and WSON Packages
  • Thermal Shutdown
  • Input Voltage Range of 3 V to 20 V
  • Dual 2-A Output
  • Output Voltage Down to 0.6 V
  • Internal Compensation
  • 500-kHz PWM Frequency
  • Separate Enable Pins
  • Separate Soft-Start Pins
  • Frequency Foldback Protection
  • 175-mΩ NMOS Switch
  • Integrated Bootstrap Diodes
  • Overcurrent Protection
  • HTSSOP and WSON Packages
  • Thermal Shutdown

The LM26400Y device is a monolithic, two-output fixed-frequency PWM step-down DC-DC regulator, in a 16-pin WSON or thermally-enhanced HTSSOP package. With a minimum number of external components and internal loop compensation, the LM26400Y is easy to use.

The ability to drive 2-A loads with an internal 175-mΩ NMOS switch using state-of-the-art 0.5-µm BiCMOS technology results in a high-power density design. The world class control circuitry allows for an ON-time as low as 40 ns, thus supporting high-frequency conversion over the entire input range of 3 V to 20 V and down to an output voltage of only 0.6 V. The LM26400Y utilizes peak current-mode control and internal compensation to provide high-performance regulation over a wide range of line and load conditions. Switching frequency is internally set to 500 kHz, optimal for a broad range of applications in terms of size versus thermal tradeoffs.

Given a nonsynchronous architecture, efficiencies above 90% are easy to achieve. External shutdown is included, enabling separate turnon and turnoff of the two channels. Additional features include programmable soft-start circuitry to reduce inrush current, pulse-by-pulse current limit and frequency foldback, integrated bootstrap structure, and thermal shutdown.

The LM26400Y device is a monolithic, two-output fixed-frequency PWM step-down DC-DC regulator, in a 16-pin WSON or thermally-enhanced HTSSOP package. With a minimum number of external components and internal loop compensation, the LM26400Y is easy to use.

The ability to drive 2-A loads with an internal 175-mΩ NMOS switch using state-of-the-art 0.5-µm BiCMOS technology results in a high-power density design. The world class control circuitry allows for an ON-time as low as 40 ns, thus supporting high-frequency conversion over the entire input range of 3 V to 20 V and down to an output voltage of only 0.6 V. The LM26400Y utilizes peak current-mode control and internal compensation to provide high-performance regulation over a wide range of line and load conditions. Switching frequency is internally set to 500 kHz, optimal for a broad range of applications in terms of size versus thermal tradeoffs.

Given a nonsynchronous architecture, efficiencies above 90% are easy to achieve. External shutdown is included, enabling separate turnon and turnoff of the two channels. Additional features include programmable soft-start circuitry to reduce inrush current, pulse-by-pulse current limit and frequency foldback, integrated bootstrap structure, and thermal shutdown.

Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 4
Type Title Date
* Data sheet LM26400Y Dual 2-A, 500-kHz Wide Input Range Buck Regulator datasheet (Rev. D) PDF | HTML 13 Oct 2015
User guide LM26400Y Step-Down Converter Evaluation Module User's Guide (Rev. B) PDF | HTML 20 Dec 2021
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
White paper Powering Multi-Rail Systems Using the LM26400Y Regulator 28 Jan 2008

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

DCA1000EVM — DCA1000 evaluation module for real-time data capture and streaming

The DCA1000 evaluation module (EVM) provides real-time data capture and streaming for two- and four-lane low-voltage differential signaling (LVDS) traffic from TI AWR and IWR radar sensor EVMs. The data can be streamed out via 1-Gbps Ethernet in real time to a PC running the MMWAVE-STUDIO tool for (...)

User guide: PDF
Not available on TI.com
Evaluation board

LM26400YEVAL — Dual 2A, 500kHz Wide Input Range Buck Regulator

The LM26400Y demonstration board was designed to provide two 2A outputs at 1.2V and 2.5V respectively. It uses the ETSSOP package option of the LM26400Y for easier probing. The design emphasizes on the compactness of the LM26400Y PCB layout and is thermally optimized. The total solution size is (...)

User guide: PDF | HTML
Not available on TI.com
Reference designs

TIDA-00431 — RF Sampling 4-GSPS ADC Reference Design with 8-GHz DC-Coupled Differential Amplifier

Wideband radio frequency (RF) receivers allow greatly increased flexibility in radio designs. The wide instantaneous bandwidth allows flexible tuning without changing hardware and the ability to capture multiple channels at widely separated frequencies.

This reference design describes a wideband RF (...)

Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00826 — 50-Ohm 2-GHz Oscilloscope Front-end Reference Design

This reference design is part of an analog front-end for 50Ω-input oscilloscope application. System designers can readily use this evaluation platform to process input signals from DC to 2 GHz in both frequency-domain and time-domain applications.
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00432 — Synchronization of JESD204B Giga-Sample ADCs using Xilinx Platform for Phased Array Radar Systems

This system level design shows how two ADC12J4000 evaluation modules (EVMs) can be synchronized together using a Xilinx VC707 platform. The design document describes the required hardware modifications and device configurations, including the clocking scheme. Example configuration files are shown (...)
Design guide: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
HTSSOP (PWP) 16 Ultra Librarian
WSON (NHQ) 16 Ultra Librarian

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos